This is the famous bar scene where Terminator enters naked (because he has just traveled through time) to acquire clothing and a bike. He scans everyone with his "Termovision" trying to find a match for his size and asks him for his clothing and bike. The biker refuses and ends up in a brawl, where the Terminator gets what he wants in the end, as well as a shotgun and some sunglasses.
Terminator 2: Judgment Day is a 1991 American science fiction action film produced and directed by James Cameron, who also co-wrote it with William Wisher. The film stars Arnold Schwarzenegger, Linda Hamilton, Robert Patrick, and Edward Furlong as its principal cast. It is the sequel to the 1984 film The Terminator, as well as the second installment in the Terminator franchise. Terminator 2 follows Sarah Connor (Hamilton) and her ten-year-old son John (Furlong) as they are pursued by a new, more advanced Terminator: the liquid metal, shapeshifting T-1000 (Patrick), sent back in time to kill John Connor and prevent him from becoming the leader of the Human Resistance. A second, less advanced Terminator (Schwarzenegger) is also sent back in time to protect John. Terminator 2 Wikipedia, retrieved November 8, 2019
Terminator 2 is a friendly and almost surrogate father to John Conner in this movie. In this scene John Connor is trying to teach the Terminator to smile and explains that it is a human emotion. Terminator scans a human smiling, and based on that data, tries so simulate the smiling act. It does not go well.
The Terminator is tracking John Connor and finds him, he manages with his "Termovision" to scan him from afar, moving fast on a motorbike, to identify him.
The Terminator want to reboot himself, because his neural net processor was set for "Read Only" for this mission. In order to save John and Sarah he needs to learn new information, and so John and Sarah helps him to reboot. While the Terminator is "offline" John and Sarah argues about the fate of the Terminator. Sarah wants to kill him, but John convinces Sarah to save him (because he is his friend).